Scott Olson/Getty Images (Reuters) - Chicago Mayor Rahm Emanuel is cutting short his vacation to return to the city as pressure on him rises after two black citizens were killed by city police officers over the weekend.

"He is cutting his family trip short so that he can continue the ongoing work of restoring accountability and trust in the Chicago Police Department," said the mayor's spokeswoman Kelley Quinn, in a statement. "He will arrive back in Chicago on Tuesday afternoon."

It was not known exactly when Emanuel was originally scheduled to return from his vacation in Cuba.

The weekend shootings have brought further scrutiny on the nation's third-largest police force, which is already under federal investigation over its use of deadly force, and the leadership of Emanuel.